THE ESSEX FIELD CLUB. 8l 



tnfimanus (Essex Naturalist, II., 48), the natural history of 

 the " Essex Emerald " moth, Euchloris (Phorodesma) smaragdaria, 

 compiled by our Secretary {Ihid. I., 120) and supplemented by 

 Mr. Fitch {Ibid. 204), my own observation on the tarsal scent- 

 tufts of the Deltoid moth, Htvminia fAethia) tavsipennalis {Ihid. 

 II., 113), Mr. Kerry's observation on the migration of Pieris 

 hrassica at Harwich {Ihid. VI., 205), Dr. H. C. Sorby's notes on 

 the food of oysters in Essex {Ihid. X., i6gj, and, among our first 

 contributions, Mr. x\rthur Lister's note on the parasitism of 

 Rotifers in cysts on Vauchevia {Pi'oc. III., xlv.). An interesting 

 paper on the worm-eating slug, Testacella scutulum, Sowerby, was 

 published by Mr. W. M. Webb in the Zoologist in 1893 

 (XVII., 251) and in the Essex Naturalist (VII., 120). The 

 slug itself had been found at Buckhurst Hill and elsewhere in 

 Essex and had been exhibited by Mr. H. C. Snell at our meeting 

 on March 14th of that year {Ihid. 46). 



In connection with this subject it will be found also that we 

 have not neglected our duty as regards the registration of new 

 and rare species which have occurred in the County. The first 

 occurrence observed in Essex, and, in fact, in England, of the 

 Rhizopod, Clathvulina elegans was recorded by our late member, 

 Mr. Charles Thomas, in 1884 {Trans. IV., 50), the new Butterfly, 

 Hesperia lineola was duly noticed (Essex Naturalist, IV., 191), 

 two new Essex worms, one new to Britain atid another belong- 

 ing to a genus and species new to science had their names and 

 addresses recorded by the Rev. Hilderic Friend in 1896 {Ibid. 

 XL, no) and the same writer has also noted the occurrence of a 

 unique species of well-worm at Chelmsford {Ibid. XL, 1), pre- 

 faced by a most valuable general introduction to the study of the 

 Phrcoryctes. The discovery of the hitherto unknown male of the 

 remarkable Hymenopterous insect, Pvestwichia aqimtica, in a pond 

 in Epping Forest, was recorded in 1896 by Mr. Frederick Enock 

 {Ibid. X., 10), while Mr. W. M. Webb notified in 1899 the 

 occurrence of a species of woodlouse {Porcellio vatzbuvgi, Brandt.) 

 new to Britain, from Warley and (possibly) Brightlingsea {Ibid. 

 XL, 127). 



Some of the communications which have been published by 

 the Club deal with the marine zoology of particular trawling and 

 dredging excursions or cruises, such, for example, as Mr. 

 E. A. Fitch's interesting report on "A Day on the Crouch 

 River," Mr. Crouch's further notes on the River Crouch 



